| Business | Phone |
| Midwest Equipment Co Inc 3 College Ave 1, Des Moines 50314 | (515) 288-2222 |
| Gifford Brown Inc 1400 Walnut St, Des Moines 50309 | (515) 243-1257 |
| Ness Electronics 2111 E 17th St, Des Moines 50316 | (515) 265-5006 |
| Selindh Machine Co 126 Franklin Ave, Des Moines 50314 | (515) 244-3723 |